package com.hc.comm.utils;

import java.security.MessageDigest;

import org.apache.commons.codec.digest.DigestUtils;


public class MD5Util {

	public final static String MD5_PSW(String mask, String password) {
		// return MD5(password + "{" + username + "}");
 
		return DigestUtils.md5Hex(password);//MD5(password);
	}

	public static String getBASE64(String s) {
		if (s == null)
			return null;
		return (new sun.misc.BASE64Encoder()).encode(s.getBytes());
	}

	public static String getFromBASE64(String s) {
		if (s == null)
			return null;

		sun.misc.BASE64Decoder decoder = new sun.misc.BASE64Decoder();
		try {
			byte[] b = decoder.decodeBuffer(s);
			return new String(b);
		} catch (Exception e) {
			return null;
		}

	}

	public final static String MD5(String s) {
		if (s == null || s.length() == 0) {
			return "";
		}

		char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
				'A', 'B', 'C', 'D', 'E', 'F' };
		try {
			byte[] btInput = s.getBytes();
			// 获得MD5摘要算法的 MessageDigest 对象
			MessageDigest mdInst = MessageDigest.getInstance("MD5");
			// 使用指定的字节更新摘要
			mdInst.update(btInput);
			// 获得密文
			byte[] md = mdInst.digest();
			// 把密文转换成十六进制的字符串形式
			int j = md.length;
			char str[] = new char[j * 2];
			int k = 0;
			for (int i = 0; i < j; i++) {
				byte byte0 = md[i];
				str[k++] = hexDigits[byte0 >>> 4 & 0xf];
				str[k++] = hexDigits[byte0 & 0xf];
			}

			return new String(str);
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}
	}

	public static void main(String[] args) {
		System.out.println(MD5Util.MD5("20121221"));
		System.out.println(MD5Util.MD5("加密"));
	}

	private static final String SERVER_KEY = "fruitexpress_dada";

	public static String makeToken(String key1, String key2) {
		String strRet = "";
		String key3 = SERVER_KEY;

		strRet = MD5(MD5(key1) + key2.substring(0, key2.length() / 2)
				+ MD5(key3));

		return strRet;
	}

}